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Finding the Fourth Proportional to 79,758,982.80, 119,638,474.20 and 68,279,857.20

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Solution

The fourth proportional to 79,758,982.80, 119,638,474.20 and 68,279,857.20 is: 102,419,785.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,758,982.80 : 119,638,474.20 = 68,279,857.20 : x
  2. Step 2: Convert to fraction form
    79,758,982.80/119,638,474.20 = 68,279,857.20/x
  3. Step 3: Cross multiply
    79,758,982.80x = 119,638,474.20 × 68,279,857.20
  4. Step 4: Simplify right side
    79,758,982.80x = 8,168,897,934,001,885
  5. Step 5: Solve for x
    x = 8,168,897,934,001,885/79,758,982.80
  6. Step 6: Final answer
    x = 102,419,785.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.